He joined the BBC in 1990 at Radio Lancashire, working as a sports journalist. Three years later he joined BBC GMR in Manchester and was the morning sports reporter on the breakfast programme, as well as presenting his own sports preview show every Friday night.
He then moved to BBC Radio Leeds, where, despite being a Lancastrian, he reported on the fortunes of Yorkshire County Cricket Club for the local stations. That was followed by a move to London, where he joined the sports department at Broadcasting House, combining reporting duties for BBC Radio Five Live, BBC Radio Four, BBC Radio Two and BBC Radio One. This included attending numerous events such as the World Athletics Championships and the Commonwealth Games.
Calley then moved to a producer-based role and was involved heavily in the coverage of football, motor sport, rugby league and numerous programmes on the network, travelling across the world. He joined BBC News 24 as a TV editor in 2002, combining producing and reporting. He was responsible for producing Formula One on the News Channel and started the Inside F1 show. He now works for BBC World and has recently had combined biography of James Hunt and Niki Lauda called 'The Playboy and the Rat' (ISBN 1780910533) released. He has also had a history of the World Water Speed Record called 'The Fast and the Forgotten' published in September 2014
In 1992, he published Blackpool: A Complete Record 1887–1992, the first statistical history of Blackpool F.C. A copy of the book is available at Harvard University Library, Trinity College, Dublin, and the University of Oxford, amongst other libraries.
In 2011, he published an updated version of Blackpool: The Complete Record (ISBN 978-1-85983-976-8), which took the Blackpool story to 22 May 2011, the day the club were relegated from the Premier League. The book's two forewords are written by former Blackpool captain Jimmy Armfield and BBC Radio sport commentator David Oates.
In 2014, he wrote 'The Fast and the Forgotten' - a history of the World Water Speed Record (ISBN-10: 1445637863)